2 * LG.Philips LB035Q02 LCD Panel driver
4 * Copyright (C) 2013 Texas Instruments
5 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
6 * Based on a driver by: Steve Sakoman <steve@sakoman.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published by
10 * the Free Software Foundation.
13 #include <linux/module.h>
14 #include <linux/delay.h>
15 #include <linux/spi/spi.h>
16 #include <linux/mutex.h>
17 #include <linux/gpio.h>
18 #include <linux/gpio/consumer.h>
20 #include <video/omapdss.h>
21 #include <video/omap-panel-data.h>
23 static struct omap_video_timings lb035q02_timings
= {
27 .pixelclock
= 6500000,
37 .vsync_level
= OMAPDSS_SIG_ACTIVE_LOW
,
38 .hsync_level
= OMAPDSS_SIG_ACTIVE_LOW
,
39 .data_pclk_edge
= OMAPDSS_DRIVE_SIG_RISING_EDGE
,
40 .de_level
= OMAPDSS_SIG_ACTIVE_HIGH
,
41 .sync_pclk_edge
= OMAPDSS_DRIVE_SIG_FALLING_EDGE
,
44 struct panel_drv_data
{
45 struct omap_dss_device dssdev
;
46 struct omap_dss_device
*in
;
48 struct spi_device
*spi
;
52 struct omap_video_timings videomode
;
54 /* used for non-DT boot, to be removed */
57 struct gpio_desc
*enable_gpio
;
60 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
62 static int lb035q02_write_reg(struct spi_device
*spi
, u8 reg
, u16 val
)
64 struct spi_message msg
;
65 struct spi_transfer index_xfer
= {
69 struct spi_transfer value_xfer
= {
74 spi_message_init(&msg
);
79 buffer
[2] = reg
& 0x7f;
80 index_xfer
.tx_buf
= buffer
;
81 spi_message_add_tail(&index_xfer
, &msg
);
87 value_xfer
.tx_buf
= buffer
+ 4;
88 spi_message_add_tail(&value_xfer
, &msg
);
90 return spi_sync(spi
, &msg
);
93 static void init_lb035q02_panel(struct spi_device
*spi
)
95 /* Init sequence from page 28 of the lb035q02 spec */
96 lb035q02_write_reg(spi
, 0x01, 0x6300);
97 lb035q02_write_reg(spi
, 0x02, 0x0200);
98 lb035q02_write_reg(spi
, 0x03, 0x0177);
99 lb035q02_write_reg(spi
, 0x04, 0x04c7);
100 lb035q02_write_reg(spi
, 0x05, 0xffc0);
101 lb035q02_write_reg(spi
, 0x06, 0xe806);
102 lb035q02_write_reg(spi
, 0x0a, 0x4008);
103 lb035q02_write_reg(spi
, 0x0b, 0x0000);
104 lb035q02_write_reg(spi
, 0x0d, 0x0030);
105 lb035q02_write_reg(spi
, 0x0e, 0x2800);
106 lb035q02_write_reg(spi
, 0x0f, 0x0000);
107 lb035q02_write_reg(spi
, 0x16, 0x9f80);
108 lb035q02_write_reg(spi
, 0x17, 0x0a0f);
109 lb035q02_write_reg(spi
, 0x1e, 0x00c1);
110 lb035q02_write_reg(spi
, 0x30, 0x0300);
111 lb035q02_write_reg(spi
, 0x31, 0x0007);
112 lb035q02_write_reg(spi
, 0x32, 0x0000);
113 lb035q02_write_reg(spi
, 0x33, 0x0000);
114 lb035q02_write_reg(spi
, 0x34, 0x0707);
115 lb035q02_write_reg(spi
, 0x35, 0x0004);
116 lb035q02_write_reg(spi
, 0x36, 0x0302);
117 lb035q02_write_reg(spi
, 0x37, 0x0202);
118 lb035q02_write_reg(spi
, 0x3a, 0x0a0d);
119 lb035q02_write_reg(spi
, 0x3b, 0x0806);
122 static int lb035q02_connect(struct omap_dss_device
*dssdev
)
124 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
125 struct omap_dss_device
*in
= ddata
->in
;
128 if (omapdss_device_is_connected(dssdev
))
131 r
= in
->ops
.dpi
->connect(in
, dssdev
);
135 init_lb035q02_panel(ddata
->spi
);
140 static void lb035q02_disconnect(struct omap_dss_device
*dssdev
)
142 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
143 struct omap_dss_device
*in
= ddata
->in
;
145 if (!omapdss_device_is_connected(dssdev
))
148 in
->ops
.dpi
->disconnect(in
, dssdev
);
151 static int lb035q02_enable(struct omap_dss_device
*dssdev
)
153 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
154 struct omap_dss_device
*in
= ddata
->in
;
157 if (!omapdss_device_is_connected(dssdev
))
160 if (omapdss_device_is_enabled(dssdev
))
163 if (ddata
->data_lines
)
164 in
->ops
.dpi
->set_data_lines(in
, ddata
->data_lines
);
165 in
->ops
.dpi
->set_timings(in
, &ddata
->videomode
);
167 r
= in
->ops
.dpi
->enable(in
);
171 if (ddata
->enable_gpio
)
172 gpiod_set_value_cansleep(ddata
->enable_gpio
, 1);
174 if (gpio_is_valid(ddata
->backlight_gpio
))
175 gpio_set_value_cansleep(ddata
->backlight_gpio
, 1);
177 dssdev
->state
= OMAP_DSS_DISPLAY_ACTIVE
;
182 static void lb035q02_disable(struct omap_dss_device
*dssdev
)
184 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
185 struct omap_dss_device
*in
= ddata
->in
;
187 if (!omapdss_device_is_enabled(dssdev
))
190 if (ddata
->enable_gpio
)
191 gpiod_set_value_cansleep(ddata
->enable_gpio
, 0);
193 if (gpio_is_valid(ddata
->backlight_gpio
))
194 gpio_set_value_cansleep(ddata
->backlight_gpio
, 0);
196 in
->ops
.dpi
->disable(in
);
198 dssdev
->state
= OMAP_DSS_DISPLAY_DISABLED
;
201 static void lb035q02_set_timings(struct omap_dss_device
*dssdev
,
202 struct omap_video_timings
*timings
)
204 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
205 struct omap_dss_device
*in
= ddata
->in
;
207 ddata
->videomode
= *timings
;
208 dssdev
->panel
.timings
= *timings
;
210 in
->ops
.dpi
->set_timings(in
, timings
);
213 static void lb035q02_get_timings(struct omap_dss_device
*dssdev
,
214 struct omap_video_timings
*timings
)
216 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
218 *timings
= ddata
->videomode
;
221 static int lb035q02_check_timings(struct omap_dss_device
*dssdev
,
222 struct omap_video_timings
*timings
)
224 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
225 struct omap_dss_device
*in
= ddata
->in
;
227 return in
->ops
.dpi
->check_timings(in
, timings
);
230 static struct omap_dss_driver lb035q02_ops
= {
231 .connect
= lb035q02_connect
,
232 .disconnect
= lb035q02_disconnect
,
234 .enable
= lb035q02_enable
,
235 .disable
= lb035q02_disable
,
237 .set_timings
= lb035q02_set_timings
,
238 .get_timings
= lb035q02_get_timings
,
239 .check_timings
= lb035q02_check_timings
,
241 .get_resolution
= omapdss_default_get_resolution
,
244 static int lb035q02_probe_of(struct spi_device
*spi
)
246 struct device_node
*node
= spi
->dev
.of_node
;
247 struct panel_drv_data
*ddata
= dev_get_drvdata(&spi
->dev
);
248 struct omap_dss_device
*in
;
249 struct gpio_desc
*gpio
;
251 gpio
= devm_gpiod_get(&spi
->dev
, "enable", GPIOD_OUT_LOW
);
253 dev_err(&spi
->dev
, "failed to parse enable gpio\n");
254 return PTR_ERR(gpio
);
257 ddata
->enable_gpio
= gpio
;
259 ddata
->backlight_gpio
= -ENOENT
;
261 in
= omapdss_of_find_source_for_first_ep(node
);
263 dev_err(&spi
->dev
, "failed to find video source\n");
272 static int lb035q02_panel_spi_probe(struct spi_device
*spi
)
274 struct panel_drv_data
*ddata
;
275 struct omap_dss_device
*dssdev
;
278 ddata
= devm_kzalloc(&spi
->dev
, sizeof(*ddata
), GFP_KERNEL
);
282 dev_set_drvdata(&spi
->dev
, ddata
);
286 if (!spi
->dev
.of_node
)
289 r
= lb035q02_probe_of(spi
);
293 if (gpio_is_valid(ddata
->backlight_gpio
)) {
294 r
= devm_gpio_request_one(&spi
->dev
, ddata
->backlight_gpio
,
295 GPIOF_OUT_INIT_LOW
, "panel backlight");
300 ddata
->videomode
= lb035q02_timings
;
302 dssdev
= &ddata
->dssdev
;
303 dssdev
->dev
= &spi
->dev
;
304 dssdev
->driver
= &lb035q02_ops
;
305 dssdev
->type
= OMAP_DISPLAY_TYPE_DPI
;
306 dssdev
->owner
= THIS_MODULE
;
307 dssdev
->panel
.timings
= ddata
->videomode
;
308 dssdev
->phy
.dpi
.data_lines
= ddata
->data_lines
;
310 r
= omapdss_register_display(dssdev
);
312 dev_err(&spi
->dev
, "Failed to register panel\n");
320 omap_dss_put_device(ddata
->in
);
324 static int lb035q02_panel_spi_remove(struct spi_device
*spi
)
326 struct panel_drv_data
*ddata
= dev_get_drvdata(&spi
->dev
);
327 struct omap_dss_device
*dssdev
= &ddata
->dssdev
;
328 struct omap_dss_device
*in
= ddata
->in
;
330 omapdss_unregister_display(dssdev
);
332 lb035q02_disable(dssdev
);
333 lb035q02_disconnect(dssdev
);
335 omap_dss_put_device(in
);
340 static const struct of_device_id lb035q02_of_match
[] = {
341 { .compatible
= "omapdss,lgphilips,lb035q02", },
345 MODULE_DEVICE_TABLE(of
, lb035q02_of_match
);
347 static struct spi_driver lb035q02_spi_driver
= {
348 .probe
= lb035q02_panel_spi_probe
,
349 .remove
= lb035q02_panel_spi_remove
,
351 .name
= "panel_lgphilips_lb035q02",
352 .of_match_table
= lb035q02_of_match
,
353 .suppress_bind_attrs
= true,
357 module_spi_driver(lb035q02_spi_driver
);
359 MODULE_ALIAS("spi:lgphilips,lb035q02");
360 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
361 MODULE_DESCRIPTION("LG.Philips LB035Q02 LCD Panel driver");
362 MODULE_LICENSE("GPL");